For hourglass frames, look for a dress that accentuates your curves, like a bodycon dress or a dress with a flared skirt
I own a few Rebecca Vallance pieces, and can personally attest to their incredible quality and flattering cut
If you love how it looks and feel great about it, go for it
As long as it had spaghetti straps, a figure-hugging fit falling to a loosely draped skirt, and was preferably floor sweeping (or at the very least ankle grazing) it didn't matter what print or colourway the dress was
The ruched surplice bodice flatters the figure, while the sweep train adds a touch of glamour
A navy blue tailored jacket, dark denim jeans, and navy ballerina flats are a great monochromatic casual chic look